Rotary force pump



June 10, 1930.' H. PETERSEN 1,762,418

abTARY FORCE PUMP Filed Dec. 5, 1928 2 Sheets-Sheet 1 HENRY PETERSEN.

June 10, 1930. H, PETERSEN 1,762,418

ROTARY FORCE P Filed Dec. 5, 1928 2 Sheets-Sheet 2 W im In... l Ilium.

Patented June 10, 1930 PATENT OFFICE HENRY PETERSEN, F MOUNT AUBURN,IOWA ROTARY FORCE PUMP Application filed December 5, 192 8. Serial No.323,886.

My invention relates to certain new and useful improvements in rotaryforce pumps of that general type embodying an eccentrically mountedrotary element and pistons 5 which, during the rotary movement of saidelement, are successively centrifugally brought into contact with theinner surface of walls of the cylinder within which they are located.

among, others, to improve upon prior constructions of this generalcharacter and to provide a simple, efficient, rotary pump of few parts,those arranged in small compass and embracing a generic feature, apiston, with intersecting through passages upon one face, in whichpassages are disposed elements, such as rollers which are at all timesso disposed as to have positive continued peripheral contact each withthe adjacent roller or member. These rollers or members are so disposedthat they have freedom of movement so as to reduce friction to aminimum, and as eachJouter roller in-its turn is brought into contactwith the wall of the eccentric passageway, it is moved along in contacttherewith throughout it course.

The piston bodymoves within its cylinder,

but the piston shaft does not extend into the Q'chamber in whichfisprovidedthe eccentric passageway or wall, thus (leaving the case of ,thepiston head such as to be provided with intersecting passageways for themovement of the rollers or other bodies, the intermediate or centerroller occupying the-space generally occupied by the end of the pistonshaft in prior devices of this character. This permits of my utilizationof this space usually occupi-ed by the end of the piston shaft to formthe intersecting passageway in the acting face of the piston body. Thesepassages, or what maybe termed the roller carriers in- I tersect eachother at right angles, extending to the periphery of the piston body ona roller, movement, the said passages being of the same depth as therollers or members th at, a

move therein. This not only simplifies the structure,.but permitsmete-use the arrangementof the rollers or bodies herein disclosed Thepresent invention has for an object,-

plane with the floor of the eccentric for free.

so that they shall have, at all times, direct intimate contact with eachother under all conditions. The flOOI /Of the passageway and the floorof the eccentric are perfectly smooth and in alignment with each other.

The invention has for an object, among others,to provide a device ofthis general character which shall be strong and durable, simple in itsconstruction, composed of comparatively few parts and those not liableto get out of order, but quickly and cheaply replaced when necessary,and a resulting structure which is capable of long continuous usewithout wear or necessity of attention.

Other objects and advantagesof the invention will hereinafter appear andthe novel features thereof will be particularly pointed out in theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the numerals of reference marked thereon, form a part ofthis specification, and in which Fig. 1 is a top plan of my improvedpump with a part brolien away and portions shown in section. 7

Fig. 2 is a section on the line 2-2 of Fig. 3.

Fig. '3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is an end view of the body member 50 withthe piston therein.

Fig. 5 is a similar view showing a modified form of inter-communicatingpassages and arrangement of contacting members.

Fig. 6 is a similar view showing another, modified arrangement.

Like numerals of reference indicate like parts throughout the severalviews.

Attention is called to the fact that in all of the forms shown thegeneric feature of continuous direct intimate contact between therollers or elements is maintained. By this means, positive uniformmovement of the parts is at all times assured to the end that the actionshall be continuous, uniform and at all times dependable.

The rollers or members which are movable in the grooves or passagewaysof the head of the piston may be solid or may be tubular or ring-formed,as may be found most expedi- 00 ent, the resultant action being in allcases the 1 indicates the outer cylinder or casing of the device: 2 and3 designate the inlet and outlet passages, it being understood thateither one may be the inlet and the other the outlet; that is, thedeviceis arranged so as to operate either way. :1

This body or cylinder 1 is provided with the tubular extension 4 tosupport thepiston shaft, the outer end of which shaft is designed toreceive a drive pulley 5. Thls extension 4 may be fixed in position inany suitable manner; in the present mstance shown as supported in asaddle 6, having openings 7 for the reception of bolts or other means bywhich it may be secured in the desired position. A strap or like member8, or a staple .bolt or the like, may be employed to firmly fix themember 4 within the saddle to prevent relative movement of the member 4;any suitable means for holding the member .4 and other parts in placemay be employed. The cylinder or casing l is formed with a concentricchamber 9 in which is mounted to revolve a piston 10, the piston shaft11' of which is disposed within the tubular extension 1, and thus thepiston 10 revolves within the chamber 9, concentrically, thereof. Beyondthis "chamber 9 the cylinder ris formed with an eccentric chamber 12,the inner wall 13 of which is contacted by the piston members 14,

I I the number of which may vary as herein illustrated.

These members 14 are arranged in grooves or channels 15 in the pistonhead 10'. In the form shown in Figs. 1 and 3, these channels 15 arearranged inthe form of a cross at right angles, that is, the channelsextending from side to side in one direction are at rightangles to thoseextending in the otherdirection, intersecting at the center, and thecenter is naturally substantially in alignment with the piston shaft 11.These channelsform intermediate members 16, as clearly seen in Fig. 3,

between each two of which, one of the memzb'ers 14 is. disposed.

In the operation of the device, the outer-.

" most rollers 14 are at all timesin contact with .the wall of theeecentric passage in the member 1, While the innermost one, in thisinstance, the .center one, is at all times, in direct contact with theadjacent periphery of each of the other members, as clearly understoodfrom .Hence, thereis no lost motion,

. is continuous.

but the action must be continuous and dependable.

Referring to Fig. 5, the casing or member 1 is in all respects,substantially the same as shown in Figs. 1-4, except that in lieu of thebody portion of the piston being constructed to accommodate five rollersor like members, the body or face of the piston is provided withpassages 17, related as shown and inter secting each other at thecenter. In these passageways are mounted for movement the members 18,four in number. These members may be solid as are those shown in Figs 414, or they may be in the nature of tubes 0 rings as shown in Fig. 5,the said members 18 being disposed so-thatthey are, at all times,

in intimate rolling engagement with each.

other. In operation, the effect is the same;

the members 18 having rolling contact with the vertical wall of theeccentric chamber of the piston head or body.

form in which the body or head of the piston is provided with a singlediametrically disposed passage 19 in which are disposed memand theseareso disposed as to have three rolling engagements with each other, theoutermost of'the members 20 being movable in contact with the wall ofthe eccentric passageway in which they travel. It will also be notedthat these outer rollers or members 20 are also at all times in directperipheral en- In Fig. 6 I have chosen toshow another,

bers 20 which may be solid or not as preferred,

gagement with the intermediate roller as will be evident from Fig. 6.

- It will beunderstood, of course, that the extension of the m ember 1in the form shown in Figs. 4, 5 and 6, receives the shaft of the pistonand that the latter is designed to be equipped wi h a pulley, the partsbeing securely fixed in proper position inany suitable manner.

Asthe operation in all the forms is for 5.11, 'intentsand purposes thesame, the description of onewill suflice for .all. Therefore, referringto Fig. 3, supposing the power is applied to the pulley 5 and the pumpstarted 1nto service. through the passage 3 enters the chamber 21 whichcommunicates with the eccentric face 22'. The piston revolving in thedirection of the arrow in Fig. 3, the liquid or air follows" The liquid.or'. air admitted such course, being prevented from movement in -theopposite direction by the frictional contact of the members 14 and theadjacent portion 16 of the piston head, and the liquid or airis carriedalong in the direction of;

the arrow (Fig.3) and is confined against exit until the member 15,shown in the positlon in Fig. 3, passes the point 23, indicated in Fig.3whenthe liquidflor air is freetoescape through the outlet 2. Thisoperation The succe ding members 14 and 16o'perate in the manner abovedescribed 5 so long as the pump is running. One of the noted that themembers 14, have,

\ I members 14 at all times is in vent back-flow of liquid or It'will beat all times, direct peripheral rolling contact with the eccentric walland with each other. The portions 16 of the piston head, however, do notalways have contact with this eccentric wall. As seen in Fig. 3, thediametrically disposed portions 16 are alternately in contact with orout of contact with this peripheral wall. Fig.

air.

' 3 shows the two portions 16 at the top of the figure in close contactwith the adjacent portion of the eccentric wall, and the intermediateportion 14 is also in'contact with such wall, so thatexit of the liquidor air at such point is efl'ectually prevented. When these parts are inthis position, the other portions 16 are out of contact and somewhatremoved from the adjacent portion of such eccentric wall, as seen in thelower portion of Fig. 3.

When in this position, there is no escape of air orl liquid in eitherdirection at the points seen in the upper part of Fig. 3. This conditionof things is always gradually changing as the piston revolves. The nextsucceeding members 14 and 16 are brought into the position previouslyassumed by the .parts, so that the condition seen in Fig. 3 ispractically at all times the same, and the liquid or air, is conductedin a continuous stream through the outlet tube.

The same result is obtained with the form shown in Figs. 5 and 6. Theportions 24 of the piston head serve the same way, at one time closingthe passage against escape of liquid or air, and each successive changebrings about the same result.

In the form shown in Fig. 6, the operation is substantially the same. Asseen in this view, the portions 25 of the piston head or body are shownat the upper portion of the figure as serving to close the exit, atwhatever portion, being removed out of contact with the wall of theeccentric portion, and these parts constantly changing relativepositions as long as the pump is operating. in this form, as well as theothers, the rollers or member 20 are at all times in positive,frictional contact witheach other, and the outermost ones always inrolling shifting engagement with the eccentric wall.

Modifications in detail may be resorted to without departing from thespirit of the invention or sacrificing any of its advantages.

What is claimed as new is 1. A rotary pump comprising a casing, a pistonchamber therein, an eccentric chamber, a piston rotatable in the pistonchamber, said chamber having an unobstructed through passage extendedtransversely thereof, and members carried by the piston and each havingshifting rolling contact with another and piston having portionsintermediate said rollposition to preing members for intermittentcontact with the wall of the eccentric chamber.

2. A rotary pump embodying a casing with concentric portion and aneccentric chamber, a piston in the chamber having intersectintransversely thereof, and

members occupying said passageways and disposed for continual shiftingrolling contact each with anwith concentric portion and an eccentric.

chamber, a piston in the chamber having through unobstructedintersecting passageways and members occupying said passageways anddisposed for continual shifting rolling contact each with another andwith the wall of the eccentric chamber, the'piston having portionsserving as cut olis for said ports, with adjacent walls of which therolling members have continued engagement.

5. In a rotary pump having a passageway therein, extended transverselytherethrough, unobstructed throughout its length, revoluble members insaid passageway, said revoluble members having at all times directintimate rolling contact each with another and with the opposed walls ofsaid passageway.

6. A. rotary pump comprising a casing having a concentric chambertherein and an eccentric chamber, a piston rotatable in said chambersand having intersecting passages extending transversely unobstructedlytherethrough, outer members and an intermediary member carried in saidintersecting passages, the outer members having shifting rolling contactwith said intermediary member and with the wall of the eccentricchamber.

7. -A rotary pump comprising a casing having a concentric chambertherein and an ec centric chamber, and a piston rotatable in saidchambers and having a passage extending transversely therethrough, outermembers and an intermediary member movable in the said passage, theouter members having shifting rolling contact with said intermediarymember and with the wall of the eccentric chamber.

l 8. A pump comprising a cylinder formed with a concentric chamber, apiston revoluble .within said cylinder, concentric thereof,

g 0 unobstructed through passageways extended through passagesunobstructed from end to end, and rolling members disposed in saidpassages at all times in direct contact with the wall of said eccentricchamber and each with the adjacent periphery of'another.

In testimony whereof I afiix, my signature.

HENRY PETERSEN.

